Concrete pipe.



i STA@ COLEMAN MERlWE'llll'lR. 0l." MUXTCLAH, NEW JERSEY, ASSIGNR TO LOtK-JINT Pilli COMPANY, Ol" NEW YORK, X.,Y., A CORPOltATlON Ol." NEW JERSEY.

CONCRETE PIPE.

Specification of Letters Patent.

` Patented July 28, 1908.

Application tiled May 21, 1907. Serial No. 374,833.

To all ywhom it may concern.'

Be it known that l, COLEMAN Mirah wi-L'rnsn, a citizen of the United States, resid ing at Montclair', in the county of Essex and State of AYew Jersey, have invented certain new and useful Improvements in Concrete P ipe, of which the following is a specificaq tlon.

My invention relates to`concrete pipes or conduits, particularly those of considerable size, constructed in sections or sectional units, as many and of such size as may be desirable or convenient, which are assembled ajnd permanently secured together-to make a chfonduit of any desired length.

j The chief object of my invention is to provide an improved joint between the conduit sections of such character that the sections t may be manufactured at low cost and at the.

`same time be thoroughly effective for the purpose in hand.

L nder my invention the sections are internally recessed at their meeting ends to form a groove on the inside of the conduit at. the joint between contiguous sections; reticulated metal fabric interlinings, embedded in the sections, project from the ends of the same to form members which project, as continuous reticulated strips or webs, into Asaid grooves and overlap' one another therein; and a concrete filling in said grooves.

serves at once to seal the joint, and to lock or rivet the overlapping webs or members together. With this construction, the back fill of the trench in whichthe conduit is laid can take place as the building of the conduit progresses, and before the concrete filling is applied; `the .sections readily adapt themselves to changes in position due to settling of the Hback fill, without dis- 'turbing the cooperative relation of their overla ping metal webs; and then, after the work lifes settled, the concrete filling can be alpplied on: the inside of the conduit to seal t e joints and. form a system of concrete riveting between the overlappingmetal webs at one operation` it is this feature which characterizes my invention, and which l believe to be new with me beyond the special form in which I have embodied it in the accompanying drawing, which l shall now proceed to describe in order that my invention may be more fully understood.

In the drawing, Figure 1 is aside eleva tion, with a portion broken away, of a pipe invention. Fig. 2 is a longitudinal section of a pipe-section or unit, .sho-wing the bell and spigot ends thereof. Fig. 3 is a longitudinal section showing thc manner of assembling the sections and'securing them. toget her.

ln the preferred form of the invention, illust rated in the thawings, the pipcsections are all exactly alike in cv v particular. As shown, cach section consi. ts of a short length of pipe, l,c,omposcd preferably of com-rete and of circular or other suitable cross section.' lhnbcddcd in the wall of the section to serve as a reinforce therefor is a metallic. interlining 2. jn'cferablv compos-cd of a shoot of expanded metall' extending completelyV around the'section. This reinforcing matcrial is of the' nature of a reticulated fabric with an open mesh or in general is provided with man v j'ierforatiox'is, and -this character is essential to eifectuating my improvement. The metallic fabric which l in practico employ is made of No. l() or No, 16, gage wire, according to size of concrete section, and has a three inch mesh One end of the section, suchend being designated by 3, is formed with an inner reccssll, the base 5 of which is beveled inwardljA fas shown, producing an undercut inni-r raboct. 'lhe inner surface of the lip is beveled or flared outwz'irdly as shown at 7. The other end, designated by 8, is provided with an outer rabbct 9, the base l0 of which is of the same thickness and at the same angle to tht` of the pipe as the lip 6 of the other end. The side of the ,rabbet 9 is inwardly beveled. or tapered, as shown at 1l, the inclination and width of this beveled portionl being exactly the same as the beveled surface 7 of the other end. lt will now be seen that the ends 3 and S are of the bell and spigot tvpc respectively", and that the former cud of one section will exactly fit the latter end ,of another, clearl)vv shown in Figs. 1 and 3.

The lip or edge of the pi )e-section at the end S is tapered or beveled inwardly, as shov-"rat 12, oppositely to the beveled portion 5 of the end 3, but at the same angle to the axis of the pipe. Hence when the secr tions are fitted together the opj'iositely inclined surfaces or bevels 5 and 12, together with the outer surface 13 of the rabbct 4, form at each joint an undercut groove on the inside of the pipe, as clearly shown 'in Fig. 3.

in order to utilize this groo 'fe for thc pim or conduit constructed av Ording to my pose of securingthe sections togctherthe tuitev l imii end 3,

Tho interior oi: bho pipo ilheroioro oi" buinripsrforatod or retioniated fabriciiing 12 exonds at opoosiigs ends of on tion hej/'ond the "boi/'ois 5 nnd 2 shown, so 'that Whoo. the two sections :ire por, together the projsotirq rsfiouined worden' inombors 2 on the n extend imo ne groovo und ovoriap or reissoope one i'zhin ho ohoi'. To admit oi' this sisso'o nf ion, die tubular intsrining 2 is n doo siigntly grantor diameter (ss-VV EI inch `or) oi; onsond, for exampitho than at tho ooh-or, hus prsni ing the 'Lr-wo members to telescope together ad jusiving ironisch/es and making s snug fit; ono with nhs other, readily and izisiiy. The with concrete 14 (by Whioh i intend any sniinhiot phisio :fnaerioi sopor/io of hardening or setting) which through the meshes of Awho Lolosooping members f2, filling the groove, soaiingi/he join; nd at the sarna 'Limo noting as zw. concreto ri s to hind together the 'two members 2 most tightiy. The oonoroto fdiing 14 thusl acts at ones as n ioni; for the tsiof 4 scoping reinforces 2, and as n soai for the joint. The undercut sides 5, oi' the groove sssuro the iiiiingj li in Diaco.

The joint i swoen A@ne sections is .'insh wiih 'the suii'soe of ihn Jonio both inside and. ont.

no impediment to the iiow oi imiter and. has no obstructions against 'whioh ssdimsni only he deposited; 'whi on the outside ii; vhars no ribs or .hor projsctongf and hence, not oniy ioss hablo to hs broken ai; the joinbs bordso has Fist on h@ bottoni of the tronoh and is heroore evenly sniporiisd ni; every llnoint.

in is-ying conduit the hook iid can take pince at ons@ the Work proceeds :rnd the sections suooossiv'oiy hind in the trench and 'fitted 'Loge her, sind the?, looking togo/ther tho i;nsrnhsrs 2 can be deferred un'ii sor 'ho iiii has setti Tho tuboisr toiosooping retion'is'ed .r nhors I3 niii readily ziasinss 'vos fio siightohnngss of posiion in nho seni/ions du@ io sotiing With-- ng ends of the awo socinionswiii our. disturbing ifhsir ooiwrnivo relation -hesI 'way .now known to rnv of carrying the,

sumo into prulotionl oliveti, what'. i oinini und dos-ire ifo secure by Letters Potent is ns foilows:

l. A. Concreto pipo or conduit composed of sections fashioned nt their neming onds to form a. groove on @he inside of the. conduit. :1t the oint between contiguous sections rationinod inotni fabric interiinings oinboddod in the sections and projecting from the ends of die suino to form members, which })1ojoot, continuous retiou'hitod strips, into smid groows and overlap one another bhoroin, and n oonoroto iiiiing in said grooves which servos ai', once to son] tho joints :ind to [ook the i'rvorispping members izogothor, snhsifnntiniiy is sst forih.

l fr oonoroto ii o or conduit composvd of tions joined ond 5o ond hy heil und spigot, joints, and forinod with grooves on the inside of the condoia at the joints, .roticnintod inem). fabric ineriinings embedded in thev sections and projecting from i/ho ends of tho soins to form tubular members which extend into tho grooves find overlap or noiosa-,ope together therein, und si. concreto 'iiliinggy in smid grooves smiling iyho joints and iookinfg to vethor thsteiosconin nioinhers suhsfnw n i n tiniiy ns soi forth.

' LEMN iiiiifiifi" 'i ii itl il Witnossos 

